Restore selinux labels for secondary dex oat directory

Bug: 36896515
Test: adb shell cmd package compile -r bg-dexopt --secondary-dex com.google.android.gms
      adb shell ls
/data/user_de/0/com.google.android.gms/app_chimera/m/0000000c/oat/arm64/
-Z
      youtube loads gms modules without extracting from apk

Change-Id: I4e12a6f532a1442a840e3ed8d01b98dd9a328eb6